Chalk holder



FIG. 1 is a perspective view of a chalk holder showing our new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image;

FIG. 3 is a right side elevational view thereof, the left side elevational view being a mirror image;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top plan view thereof.

The broken lines in FIGS. 1-4 are included to show features that form no part of the claimed design. 

CLAIM The ornamental design for a chalk holder, as shown and described. 